Glass-grinding machine.



No. 737,393. PATENTED AUG:- 25,1903 0. L. GOEHRING & W. TROGHE.

GLASS GRINDING MACHINE.

APPLICATION FILED MAY 28, 1903. N0 MODEL.

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No. 737,393. PATENTED AUG. 25, 1903. 0. L. GOEHRINGd; W. TROGHE. GLASS GRINDING MACHINE. 7 APPLICATION FILED MAY 2a, 1903.

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G. L. GO-EHRING & W. TROGHE.

GLASS GRINDING MACHINE.

APPLICATION FILED, MAY 28, 1903. N0 MODEL.

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rte. 737,393.

NlTED STATES iatented August 25, 1903 PATENT OFFICE.

CHARLES 1.. Gonnrtme AND WILLIAM "rnooun, OF AKRON, 01110; SAID 'raoonn ASSIGNOR TO SAID GOEHRING.

GLASS-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 737,393, dated August 25, 1903. Application filed May 28, 1903. Serial No-159,20l 1. (No model.)

To whom itmay concern:

Be it known that we, CHARLES L. Gonna- ING and WILLIAM TROCHE, of Akron, in the county of Summit, State of Ohio,have invented certain new and useful Improvements in Glass-Grinding Machines; and we do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in glass-grinding machinery, and particularly, though not exclusively, to that class of machinery adapted for the formation of bevels on glass plates, the objects of the invention being to provide a mechanism with which glass of different thickness or of irregular thickness may be ground with uniform and regular bevels without changing the adjustment of the mechanism, further objects of the invention being to simplify the mechanism and reduce the cost of manufacture and operation of the machine, at the same time permitting of the formation of fiat as distinguished from concave bevels.

The invention consists in certain novel details of construction and combinations and arrangements of parts, all as will be now described, and pointed out particularly in the appended claims.

Referring to the accompanying drawings, Figure 1 is a side elevation of a machine embodying the present improvements, portions being broken away and in section to disclose underlying parts. Fig. 2 is a similar view looking at the front of the machine. Fig. 2 is a detail sectional view showing the adjusting mechanism at one end of the vertically-adjustable frame. Fig. 3 is a top plan with portions broken away to show underlying parts.

Like letters of reference in the several figures indicate the same parts.

The letter A in said drawings indicates a frame of any suitable construction, but preferably provided with an overhang or extension A, in which a drive-shaft B is journaled and adapted to receive motion from any suitable source through pulleys B. Located preferably directly below the driveshaft is a grinder C, said grinder being supported on a shaft 0, journaled in bearings 0 mounted to slide on ways D on the frame and extending transversely of the axis of the grinder, but parallel with the plane of the surface to be ground. The grinderis driven by chains B having sufficient slack to permit of the traverse of the grinder on the ways D, the necessary slack, however, being slight,

because the tracks are tangential to an arc struck with the drive-shaft as a center.

Reciprocatory motion is imparted to the grinder by connecting-rods E,connected with the bearings C at the forward ends and with crank-arms E on shaft E at the rear ends. The shaft E is adapted to be oscillated by gearing interposed between the same and the drive-shaft B. Any suitable reverse gear ing might be employed; but a type having a fast movement in one direction and a slow movement in the other direction is preferably employed. As illustrated, the shaft E is provided with a worm-wheel F, with which a worm F meshes, said worm being mounted on a shaft F provided with a bevel-gear F Meshing with the gear F are oppositely-located gears F 'F loose on shafts G and G, respectively, but adapted to be clutched thereto by clutches H and H. The shafts G and G are driven from the main drive-shaft by pulleys and belts I and I, the pulleys being properly proportioned to impart a fast motion to the shaft G and a slow motion to the shaft G. The clutches are both operated by a clutch-rod K, one being thrown into engagement when the rod is moved in one direction and the other when the rod is moved in the other direction, both being disengaged when the rod is free or in an intermediate position. The rod is preferably operated manually to throw the clutches into engagement by levers extending out to the front of the machine; but they are preferably released automatically to arrest the traverse of the grinder at each extreme of its movement.

As a convenient and simple mechanism for the purpose mentioned the clutch-rod is connected at one end to a crank on a rockshaft lo, journaled inthe side of the frame, and levers L L, extending out to the front of the machine, cooperate with arms Z Z, projecting in opposite directions from the rockshaft whereby when the lever L is raised the train of gearing G H I is thrown into operation and the grinder is advanced, but when the lever L is raised the other train of gearing is thrown into operation and the grinder moved in the opposite direction.

Catches M M on the levers or arms Z Z are adapted to take over a projection or bracket M on the frame to retain the lever elevated and the clutch in engagement. Said catches are spring-pressed and are adapted to be released from the bracket M by adjustable knockoff projections M on one of the bearings C the arrangement being such that the catch is released when the grinder reaches the limit of its traverse; but by adjusting the knockolf-blocks the length of the traverse may be made long or short, as desired. When a catch is released, the weight of the lever, together with the tendency of the clutch to clear itself, will cause a sufficient release to disengage the driving mechanism without attention on the part of the attendant, who has simply to raise the other lever in order to inaugurate the movement in the opposite direction. for presentation to the grinder at such an angle with relation to the plane of traverse of the grinder that the cut will be made in the plane of the bevel or surface being ground; but difficulty has been experienced in making bevels true with the face of the plate at all points. This is owing to the fact that the plates vary in thickness and are of irregular thickness. Thus some plates are thicker at one edge than at the other and others thicker or thinner at the center than at the sides, and in the present mechanism provision is made for holding the glass with its face against a true bed -plate, preferably by clamps capableof conforming to the irregularities of the rear face of the glass, whereby the bevel may be made uniform with respect to the face of the glass regardless of variations in the thickness of the plate.

The machine-frame is provided with standards N near the front, in which a verticallymovable frame N is adapted to slide, the

adjustment of the frame being efiected by screws n, journaled in the frame N and threaded into the standards, as shown in Fig. 2* and indicated by dotted lines in Fig. 2, whereby when the screws are turned the whole frame N and screws will be elevated or depressed, as the case maybe. Said screws are preferably connected for simultaneous rotation by a cross-shaft n and bevel-gears n while a hand-wheel n is located on the cross-shaft for operating thesame. In the lower portion of the frame N there is pivoted on an axis parallel with the axis of the grinder a bed or faced plate 0, the under surface of which is true for positioning the face of the glass with reference to the grinder. The inclination of the bed or faced plate is determined and set by the adj ustingscrew 0, journaled at the upper end in a The glass is held rocking bearing 0 in the frame N and threaded at the lower end into a similar bearing 0 on the bed forward of the axis of the latter.

As before stated, the under face of the bed determines the position of the face of the glass withreference to the grinder, and while it may be moved to clamp the glass it is preferably adjusted to give the desired depth and width of bevel and left in such position, the glass being clamped to it by clamping mechanism to be now described. This clamping mechanism consists of at least two verticallymovable supports or clamps P P, mounted on standards pp, guided vertically in ways or guides Q on the main frame and adapted to be raised and lowered by racks P and pinions 1" r, mounted on ali ned shafts R R. The clamps P P are mounted so as to have a free rocking movement to a limited extent in any direction, for which purpose they are pivoted on secondary clamps P P by semicylindrical ribs or projections 19 19 seating in similar grooves in the secondary clamps,movement longitudinally of the ribs being prevented by stops 19 as shown. The secondary clamps P P are pivotally mounted on the standards, usually by pin or other suitable connections 19*, at right angles to the pivots of the primary clamps. Such construction permits of the ready removal of the clamps P P, and at the same time they may adjust themselves to the angle of the rear face of the glass. By the employment of more than a single clamp they will spring the glass plate into uniform contact with the bed should the irregularity of the glass so require, or glass plates of smaller size may be operated on by using a single side, or separate plates may be held by each clamp. As shown, for instance,

in Fig. 2, one clamp is advanced to hold a plate while the other is retracted.

The shafts R and R are provided with worm-wheels S and S, with which worms S S engage. hand-wheels S S attached thereto, will raise or lower the clamps. Provision is made, however, for operating both clamps simultaneously from one hand-wheel, for which purpose the meeting ends of the shafts are pro vided with a clutch-coupling T,and the wormwheel S is loose on the shaft R; but it is adapted to be clutched therewith by a clutch T. Both clutches are preferably operated by a single shifter -bar T connected with the clutches by levers T and adapted to be operated by a hand lever T pivoted on a bracket T as shownin Fig. 1.

A movement of the hand-lever in one direction will couple the shafts together for operation by the hand-wheel S and at the same time free the connection between the shaft R and wormwheel S. A movement of the hand-lever in the opposite direction will disconnect the shafts and connect the wormwheel S with the shaft R, permitting the clamps to be adjusted independently. Where desired, the grinding may be effected under Rotation of the worms by they water, for which purpose a water-pan V may be mounted on the frame of the machine, the standards for the clamps passing through stuffing-boxes V in the bottom of the waterpan. Where the grinding takes place in the water-pan, the currents set up by the grinder tend to float the glass as it is being put in position, and in order'to prevent this and at the same time provide a gage against which the edge of the glass may be positioned waterbars W are provided along the front edges of the clamps, such bars projecting only far enough to catch the edge of the glass, butnot far enough to lie in the path of the gripder.

In the arrangement of mechanism described it will be noted that the heavy parts of the machine are not moved in grinding or in shifting or placing the glass in position for grinding, whereby the power required to run the machine and the labor of the attendant are greatly reduced.

Having thus described our invention, what We claim as new, and desire to secure by Letters Patent, is-

1. In a glass-grinding machine, the combi nation with a grinder and bed against which the face of the glass is positioned, of a plurality of clamps for pressing the glass against the bed whereby inequalities in the thickness of the glass may be compensated for and means for effecting a relative traverse of the bed and grinder; substantially as described.

2. In a glass-grinding machine, the combination with a grinder and bed against which the face of the glass is positioned, both located on the same side of the plane of the glass, of a plurality of clamps having a limited independent rocking movement to conform to the rear face of the glass, means for moving said clamps to press the glass against the bed whereby its face is made to conform to the bed and means for effecting a relative traverse of the bed and grinder; substantially as described.

3. In a glass-grinding machine, the combination with the grinder and bed against which the face of the glass is positioned both located on the same side of the plane of the glass and means for effectinga traverse with respect to each other in grinding, of a plurality of clamps located on the opposite side of the plane of the glass and adapted to conform to the rear face of the glass and means for advancing the clamps against the bed; substantially as described.

4. In a glass-grinding machine, the combination with the rotary grinder and the adjustable bed against which the face of the glass is positioned, both located on the same side of the plane of the glass and having a traverse with respect to each other, of a plurality of clamps mountedto conform independently to the rear face of the glass and means for advancing said clamps to hold the glass against the bed; substantially as described.

5. In a glass-grinding machine, the combination with the rotary grinder and the bed against which the face of the glass is positioned mounted on an axis parallel with the axis of thegrinder, said grinder and bed being both located on the same side of the plane of the glass, of a plurality of clamps mounted to conform independently to the rear face of the glass and means for advancing said clamps to hold the glass against the bed; substantially as described.

6. In a glass-grinding machine, the combination with the rotary grinder and the bed against which the face of the glass is positioned, both located on the same side of the plane of the glass, of a plurality of clamps located on the opposite side of the plane of the glass, mechanism for advancing said clamps independently and a clutch for coupling said mechanisms together whereby the clamps may be advanced simultaneously; substantially as described.

7. Ina glass-grinding machine, the combination with the grinder, and the bed against which the face of the glass is positioned, both located on the same side of the plane of the glass, of a plurality of clamps located on the opposite side of the plane of the glass and each independently mounted to conform to the rear face of the glass, mechanism for advancing said clamps independently and a clutch for coupling said mechanisms together whereby the clamps maybe advanced simultaneously; substantially as described.

8. In a glass-grinding machine, the combination with the grinder and the bed against which the face of the glass is positioned, both located on the same side of the plane of the glass, of a plurality of clamps located on the opposite side of the plane of the glass, racks for advancing the clamps, independent pinions engaging said racks, a clutch for connecting the pinions for simultaneous rotation and means for rotating the pinions; substantially as described.

9. In a glass-grinding machine, thecombination with the grinder and bed against which the glass is clamped, of a plurality of clamps and mechanism for advancing the clamps embodying a rack and pinion for each clamp, a clutch for connecting the pinions for simultaneous movement, a hand-wheel worm and worm-wheel and a clutch between said wormwheel and one pinion; substantially as described.

10. In a glass-grinding machine, the combination with a bed and grinder, of a. clamp for holding the glass against the bed, a bearing on which said clamp is pivoted consisting of a recess and projection, whereby the clamp may be readily removed and stops for preventing movement of the clamp longitudinally of the bearing; substantially as described. v

11. In a glass-grinding machine, the combination with the main frame and grinder, of a vertically-movable frame mountedin the main frame and extending above the plane of the ICC glass with means for adjusting the same vertically, a bed pivoted in said frame on an axis parallel with the axis of the grinder, and havingits under face formed to .position the glass and a vertically-movable clamp below the bed; substantially as described.

12. In a glass-grinding machine, the combination with the glass-support, of a rotary cylindrical grinder jonrnaled in bearings mounted on ways extending transversely of'but parallel with the plane of the surface to be ground at right angles to the axis of the grinder, means for effecting a traverse of the grinder on said ways and means for rotating the grinder during such traverse; substantially as described.

13. In a glass-grindingmachine, the combination with the glass-support held in fixed position when the glass is in position for grinding, of a rotary cylindrical grinder journaled in bearings mounted on ways extending transversely of but parallel with the plane of the surface to be ground at right angles to the drive-shaft and grinder for rotating the latter, and means for moving the grinder on its ways during the grindingoperation; substantially as described.

15. In a glass-grinding machine the combination with the glass-support and rotary grinder, of a mechanism for effecting a rela= tive bodily traverse of the support and rotary grinder embodying an oscillatory shaft, a drive-shaft, a reverse gearing for the oscillatory shaft, independent hand-levers controlling the direction of movement of the oscillatory shaft, catches for holding the levers in operative position and knockofi-blocks for releasing the catches at each extreme of the traverse; substantially as described.

16. In a glass-grinding machine, the combination with the glass-support and rotary grinder, the latter being mounted to have a bodily traverse in the plane of the surface being ground, of a mechanism for efiecting the traverse of the grinder consisting of a rock-shaft, a reverse gearing for oscillating the shaft, independent catches for holding the reverse gearing in operative engagement and knockoff-blocks moving with the grinder and cooperating with the catches at the extremes of its movement to release the gearing and arrest the traverse of the grinder; substantially as described.

17. In a glass-grinding machine, the combination with the glass-support and grinder mounted to have a bodily traverse in the plane of the surface being ground, of an oscillatory shaft connected with said grinder, a reverse gearing for oscillating said shaft embodying independent clutches, means for moving said clutches into operative position, catches for holding the clutches in operative position and knockoff-blocks moving with the grinder and cooperating with the catches to release the same and arrest the traverse of the grinder; substantially as described.

1 CHARLES L. GOEHRING. WILLIAM TROOHE. Witnesses:

F. J. STEINERT, THOMAS OLEMENGER. 

